David Beckham could be a doubt for the crunch Euro 2004 qualifier with Turkey after injuring his right foot in Real Madrid's 2-0 defeat at Valencia on Saturday.

The England captain landed heavily on the foot, bruising the instep, after the studs in his left boot caught in the turf as he took a free-kick late in game.

He is almost certainly out of Wednesday's Champions League encounter with Porto, although the player himself was playing his cards close to his chest.

He said: "It's hard to tell because it's the first day after the game, it's hurting at the moment and we'll have to wait and see.

"I've got a couple of days to recover - I hope it will be okay, but I'm not sure."

After the Porto game, the last match Beckham can play in before the international break is against Espanyol next Sunday.

And, asked whether he thought he would be available for the match in Istanbul on October 11, the England skipper replied: "I really don't know. I'm not sure if I'll be fit for Wednesday, that's up to the doctors and me to decide. Turkey is two weeks away and we have got a lot of important games before then."